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LU-9679 lustre: use LIST_HEAD() for local lists.
[fs/lustre-release.git] / lustre / mdt / mdt_handler.c
index 771f6eb..369ea1e 100644 (file)
@@ -555,7 +555,7 @@ int mdt_pack_size2body(struct mdt_thread_info *info,
        RETURN(0);
 }
 
-#ifdef CONFIG_FS_POSIX_ACL
+#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
 /*
  * Pack ACL data into the reply. UIDs/GIDs are mapped and filtered by nodemap.
  *
@@ -801,10 +801,15 @@ void mdt_pack_attr2body(struct mdt_thread_info *info, struct mdt_body *b,
                        b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
                } else if (info->mti_som_valid) { /* som is valid */
                        b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
+               } else if (ma->ma_valid & MA_SOM) { /* lsom is valid */
+                       b->mbo_valid |= OBD_MD_FLLAZYSIZE | OBD_MD_FLLAZYBLOCKS;
+                       b->mbo_size = ma->ma_som.ms_size;
+                       b->mbo_blocks = ma->ma_som.ms_blocks;
                }
        }
 
-       if (fid != NULL && (b->mbo_valid & OBD_MD_FLSIZE))
+       if (fid != NULL && (b->mbo_valid & OBD_MD_FLSIZE ||
+                           b->mbo_valid & OBD_MD_FLLAZYSIZE))
                CDEBUG(D_VFSTRACE, DFID": returning size %llu\n",
                       PFID(fid), (unsigned long long)b->mbo_size);
 
@@ -1107,8 +1112,8 @@ int mdt_attr_get_complex(struct mdt_thread_info *info,
        if (need & MA_HSM && S_ISREG(mode)) {
                buf->lb_buf = info->mti_xattr_buf;
                buf->lb_len = sizeof(info->mti_xattr_buf);
-               CLASSERT(sizeof(struct hsm_attrs) <=
-                        sizeof(info->mti_xattr_buf));
+               BUILD_BUG_ON(sizeof(struct hsm_attrs) >
+                            sizeof(info->mti_xattr_buf));
                rc2 = mo_xattr_get(info->mti_env, next, buf, XATTR_NAME_HSM);
                rc2 = lustre_buf2hsm(info->mti_xattr_buf, rc2, &ma->ma_hsm);
                if (rc2 == 0)
@@ -1117,7 +1122,7 @@ int mdt_attr_get_complex(struct mdt_thread_info *info,
                        GOTO(out, rc = rc2);
        }
 
-#ifdef CONFIG_FS_POSIX_ACL
+#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
        if (need & MA_ACL_DEF && S_ISDIR(mode)) {
                buf->lb_buf = ma->ma_acl;
                buf->lb_len = ma->ma_acl_size;
@@ -1351,7 +1356,7 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
                       repbody->mbo_max_mdsize);
        }
 
-#ifdef CONFIG_FS_POSIX_ACL
+#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
        if ((exp_connect_flags(req->rq_export) & OBD_CONNECT_ACL) &&
                 (reqbody->mbo_valid & OBD_MD_FLACL)) {
                struct lu_nodemap *nodemap = nodemap_get_from_exp(exp);
@@ -1380,9 +1385,11 @@ static int mdt_getattr(struct tgt_session_info *tsi)
         int rc, rc2;
         ENTRY;
 
-        reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
-        LASSERT(reqbody);
-        LASSERT(obj != NULL);
+       if (unlikely(info->mti_object == NULL))
+               RETURN(-EPROTO);
+
+       reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
+       LASSERT(reqbody);
        LASSERT(lu_object_assert_exists(&obj->mot_obj));
 
        /* Special case for Data-on-MDT files to get data version */
@@ -1457,42 +1464,54 @@ out:
 /**
  * Handler of layout intent RPC requiring the layout modification
  *
- * \param[in] info     thread environment
- * \param[in] obj      object
- * \param[in] layout   layout change descriptor
+ * \param[in]  info    thread environment
+ * \param[in]  obj     object
+ * \param[out] lhc     object ldlm lock handle
+ * \param[in]  layout  layout change descriptor
  *
  * \retval 0   on success
  * \retval < 0 error code
  */
 int mdt_layout_change(struct mdt_thread_info *info, struct mdt_object *obj,
+                     struct mdt_lock_handle *lhc,
                      struct md_layout_change *layout)
 {
-       struct mdt_lock_handle *lh = &info->mti_lh[MDT_LH_LOCAL];
        int rc;
+
        ENTRY;
 
        if (!mdt_object_exists(obj))
-               GOTO(out, rc = -ENOENT);
+               RETURN(-ENOENT);
 
        if (!S_ISREG(lu_object_attr(&obj->mot_obj)))
-               GOTO(out, rc = -EINVAL);
+               RETURN(-EINVAL);
 
        rc = mo_permission(info->mti_env, NULL, mdt_object_child(obj), NULL,
                           MAY_WRITE);
        if (rc)
-               GOTO(out, rc);
+               RETURN(rc);
 
-       /* take layout lock to prepare layout change */
-       mdt_lock_reg_init(lh, LCK_EX);
-       rc = mdt_object_lock(info, obj, lh, MDS_INODELOCK_LAYOUT);
-       if (rc)
-               GOTO(out, rc);
+       rc = mdt_check_resent_lock(info, obj, lhc);
+       if (rc < 0)
+               RETURN(rc);
+
+       if (rc > 0) {
+               /* not resent */
+               mdt_lock_handle_init(lhc);
+               mdt_lock_reg_init(lhc, LCK_EX);
+               rc = mdt_reint_object_lock(info, obj, lhc, MDS_INODELOCK_LAYOUT,
+                                          false);
+               if (rc)
+                       RETURN(rc);
+       }
 
        mutex_lock(&obj->mot_som_mutex);
        rc = mo_layout_change(info->mti_env, mdt_object_child(obj), layout);
        mutex_unlock(&obj->mot_som_mutex);
-       mdt_object_unlock(info, obj, lh, 1);
-out:
+
+       if (rc)
+               mdt_object_unlock(info, obj, lhc, 1);
+
        RETURN(rc);
 }
 
@@ -1540,6 +1559,8 @@ static int mdt_swap_layouts(struct tgt_session_info *tsi)
                RETURN(-EOPNOTSUPP);
 
        info = tsi2mdt_info(tsi);
+       if (unlikely(info->mti_object == NULL))
+               RETURN(-EPROTO);
 
        if (info->mti_dlm_req != NULL)
                ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
@@ -1714,11 +1735,14 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                }
 
                rc = mdt_getattr_internal(info, child, 0);
-               if (unlikely(rc != 0))
+               if (unlikely(rc != 0)) {
                        mdt_object_unlock(info, child, lhc, 1);
+                       RETURN(rc);
+               }
 
-               mdt_pack_secctx_in_reply(info, child);
-
+               rc = mdt_pack_secctx_in_reply(info, child);
+               if (unlikely(rc))
+                       mdt_object_unlock(info, child, lhc, 1);
                RETURN(rc);
        }
 
@@ -1833,7 +1857,7 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                mdt_lock_reg_init(lhc, LCK_PR);
 
                if (!(child_bits & MDS_INODELOCK_UPDATE) &&
-                     mdt_object_exists(child) && !mdt_object_remote(child)) {
+                   !mdt_object_remote(child)) {
                        struct md_attr *ma = &info->mti_attr;
 
                        ma->ma_valid = 0;
@@ -1847,12 +1871,12 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                         * lock and this might save us RPC on later STAT. For
                         * directories, it also let negative dentry cache start
                         * working for this dir. */
-                        if (ma->ma_valid & MA_INODE &&
-                            ma->ma_attr.la_valid & LA_CTIME &&
-                            info->mti_mdt->mdt_namespace->ns_ctime_age_limit +
-                               ma->ma_attr.la_ctime < ktime_get_real_seconds())
-                                child_bits |= MDS_INODELOCK_UPDATE;
-                }
+                       if (ma->ma_valid & MA_INODE &&
+                           ma->ma_attr.la_valid & LA_CTIME &&
+                           info->mti_mdt->mdt_namespace->ns_ctime_age_limit +
+                           ma->ma_attr.la_ctime < ktime_get_real_seconds())
+                               child_bits |= MDS_INODELOCK_UPDATE;
+               }
 
                /* layout lock must be granted in a best-effort way
                 * for IT operations */
@@ -1894,7 +1918,11 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                GOTO(out_child, rc);
        }
 
-       mdt_pack_secctx_in_reply(info, child);
+       rc = mdt_pack_secctx_in_reply(info, child);
+       if (unlikely(rc)) {
+               mdt_object_unlock(info, child, lhc, 1);
+               GOTO(out_child, rc);
+       }
 
        lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
        if (lock) {
@@ -1907,8 +1935,7 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                         PFID(mdt_object_fid(child)));
 
                if (S_ISREG(lu_object_attr(&child->mot_obj)) &&
-                   mdt_object_exists(child) && !mdt_object_remote(child) &&
-                   child != parent) {
+                   !mdt_object_remote(child) && child != parent) {
                        mdt_object_put(info->mti_env, child);
                        rc = mdt_pack_size2body(info, child_fid,
                                                &lhc->mlh_reg_lh);
@@ -1974,6 +2001,219 @@ out_shrink:
        return rc;
 }
 
+static int mdt_rmfid_unlink(struct mdt_thread_info *info,
+                           const struct lu_fid *pfid,
+                           const struct lu_name *name,
+                           struct mdt_object *obj, s64 ctime)
+{
+       struct lu_fid *child_fid = &info->mti_tmp_fid1;
+       struct ldlm_enqueue_info *einfo = &info->mti_einfo[0];
+       struct mdt_device *mdt = info->mti_mdt;
+       struct md_attr *ma = &info->mti_attr;
+       struct mdt_lock_handle *parent_lh;
+       struct mdt_lock_handle *child_lh;
+       struct mdt_object *pobj;
+       bool cos_incompat = false;
+       int rc;
+       ENTRY;
+
+       pobj = mdt_object_find(info->mti_env, mdt, pfid);
+       if (IS_ERR(pobj))
+               GOTO(out, rc = PTR_ERR(pobj));
+
+       parent_lh = &info->mti_lh[MDT_LH_PARENT];
+       mdt_lock_pdo_init(parent_lh, LCK_PW, name);
+       rc = mdt_object_lock(info, pobj, parent_lh, MDS_INODELOCK_UPDATE);
+       if (rc != 0)
+               GOTO(put_parent, rc);
+
+       if (mdt_object_remote(pobj))
+               cos_incompat = true;
+
+       rc = mdo_lookup(info->mti_env, mdt_object_child(pobj),
+                       name, child_fid, &info->mti_spec);
+       if (rc != 0)
+               GOTO(unlock_parent, rc);
+
+       if (!lu_fid_eq(child_fid, mdt_object_fid(obj)))
+               GOTO(unlock_parent, rc = -EREMCHG);
+
+       child_lh = &info->mti_lh[MDT_LH_CHILD];
+       mdt_lock_reg_init(child_lh, LCK_EX);
+       rc = mdt_reint_striped_lock(info, obj, child_lh,
+                                   MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE,
+                                   einfo, cos_incompat);
+       if (rc != 0)
+               GOTO(unlock_parent, rc);
+
+       if (atomic_read(&obj->mot_open_count)) {
+               CDEBUG(D_OTHER, "object "DFID" open, skip\n",
+                      PFID(mdt_object_fid(obj)));
+               GOTO(unlock_child, rc = -EBUSY);
+       }
+
+       ma->ma_need = 0;
+       ma->ma_valid = MA_INODE;
+       ma->ma_attr.la_valid = LA_CTIME;
+       ma->ma_attr.la_ctime = ctime;
+
+       mutex_lock(&obj->mot_lov_mutex);
+
+       rc = mdo_unlink(info->mti_env, mdt_object_child(pobj),
+                       mdt_object_child(obj), name, ma, 0);
+
+       mutex_unlock(&obj->mot_lov_mutex);
+
+unlock_child:
+       mdt_reint_striped_unlock(info, obj, child_lh, einfo, 1);
+unlock_parent:
+       mdt_object_unlock(info, pobj, parent_lh, 1);
+put_parent:
+       mdt_object_put(info->mti_env, pobj);
+out:
+       RETURN(rc);
+}
+
+static int mdt_rmfid_check_permission(struct mdt_thread_info *info,
+                                       struct mdt_object *obj)
+{
+       struct lu_ucred *uc = lu_ucred(info->mti_env);
+       struct md_attr *ma = &info->mti_attr;
+       struct lu_attr *la = &ma->ma_attr;
+       int rc = 0;
+       ENTRY;
+
+       ma->ma_need = MA_INODE;
+       rc = mo_attr_get(info->mti_env, mdt_object_child(obj), ma);
+       if (rc)
+               GOTO(out, rc);
+
+       if (la->la_flags & LUSTRE_IMMUTABLE_FL)
+                       rc = -EACCES;
+
+       if (md_capable(uc, CFS_CAP_DAC_OVERRIDE))
+               RETURN(0);
+       if (uc->uc_fsuid == la->la_uid) {
+               if ((la->la_mode & S_IWUSR) == 0)
+                       rc = -EACCES;
+       } else if (uc->uc_fsgid == la->la_gid) {
+               if ((la->la_mode & S_IWGRP) == 0)
+                       rc = -EACCES;
+       } else if ((la->la_mode & S_IWOTH) == 0) {
+                       rc = -EACCES;
+       }
+
+out:
+       RETURN(rc);
+}
+
+static int mdt_rmfid_one(struct mdt_thread_info *info, struct lu_fid *fid,
+                        s64 ctime)
+{
+       struct mdt_device *mdt = info->mti_mdt;
+       struct mdt_object *obj = NULL;
+       struct linkea_data ldata = { NULL };
+       struct lu_buf *buf = &info->mti_big_buf;
+       struct lu_name *name = &info->mti_name;
+       struct lu_fid *pfid = &info->mti_tmp_fid1;
+       struct link_ea_header *leh;
+       struct link_ea_entry *lee;
+       int reclen, count, rc = 0;
+       ENTRY;
+
+       if (!fid_is_sane(fid))
+               GOTO(out, rc = -EINVAL);
+
+       if (!fid_is_namespace_visible(fid))
+               GOTO(out, rc = -EINVAL);
+
+       obj = mdt_object_find(info->mti_env, mdt, fid);
+       if (IS_ERR(obj))
+               GOTO(out, rc = PTR_ERR(obj));
+
+       if (mdt_object_remote(obj))
+               GOTO(out, rc = -EREMOTE);
+       if (!mdt_object_exists(obj) || lu_object_is_dying(&obj->mot_header))
+               GOTO(out, rc = -ENOENT);
+
+       rc = mdt_rmfid_check_permission(info, obj);
+       if (rc)
+               GOTO(out, rc);
+
+       /* take LinkEA */
+       buf = lu_buf_check_and_alloc(buf, PATH_MAX);
+       if (!buf->lb_buf)
+               GOTO(out, rc = -ENOMEM);
+
+       ldata.ld_buf = buf;
+       rc = mdt_links_read(info, obj, &ldata);
+       if (rc)
+               GOTO(out, rc);
+
+       leh = buf->lb_buf;
+       lee = (struct link_ea_entry *)(leh + 1);
+       for (count = 0; count < leh->leh_reccount; count++) {
+               /* remove every hardlink */
+               linkea_entry_unpack(lee, &reclen, name, pfid);
+               lee = (struct link_ea_entry *) ((char *)lee + reclen);
+               rc = mdt_rmfid_unlink(info, pfid, name, obj, ctime);
+               if (rc)
+                       break;
+       }
+
+out:
+       if (obj && !IS_ERR(obj))
+               mdt_object_put(info->mti_env, obj);
+       if (info->mti_big_buf.lb_buf)
+               lu_buf_free(&info->mti_big_buf);
+
+       RETURN(rc);
+}
+
+static int mdt_rmfid(struct tgt_session_info *tsi)
+{
+       struct mdt_thread_info *mti = tsi2mdt_info(tsi);
+       struct mdt_body *reqbody;
+       struct lu_fid *fids, *rfids;
+       int bufsize, rc;
+       __u32 *rcs;
+       int i, nr;
+       ENTRY;
+
+       reqbody = req_capsule_client_get(tsi->tsi_pill, &RMF_MDT_BODY);
+       if (reqbody == NULL)
+               RETURN(-EPROTO);
+       bufsize = req_capsule_get_size(tsi->tsi_pill, &RMF_FID_ARRAY,
+                                      RCL_CLIENT);
+       nr = bufsize / sizeof(struct lu_fid);
+       if (nr * sizeof(struct lu_fid) != bufsize)
+               RETURN(-EINVAL);
+       req_capsule_set_size(tsi->tsi_pill, &RMF_RCS,
+                            RCL_SERVER, nr * sizeof(__u32));
+       req_capsule_set_size(tsi->tsi_pill, &RMF_FID_ARRAY,
+                            RCL_SERVER, nr * sizeof(struct lu_fid));
+       rc = req_capsule_server_pack(tsi->tsi_pill);
+       if (rc)
+               GOTO(out, rc = err_serious(rc));
+       fids = req_capsule_client_get(tsi->tsi_pill, &RMF_FID_ARRAY);
+       if (fids == NULL)
+               RETURN(-EPROTO);
+       rcs = req_capsule_server_get(tsi->tsi_pill, &RMF_RCS);
+       LASSERT(rcs);
+       rfids = req_capsule_server_get(tsi->tsi_pill, &RMF_FID_ARRAY);
+       LASSERT(rfids);
+
+       mdt_init_ucred(mti, reqbody);
+       for (i = 0; i < nr; i++) {
+               rfids[i] = fids[i];
+               rcs[i] = mdt_rmfid_one(mti, fids + i, reqbody->mbo_ctime);
+       }
+       mdt_exit_ucred(mti);
+
+out:
+       RETURN(rc);
+}
+
 static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
                         void *karg, void __user *uarg);
 
@@ -2228,7 +2468,7 @@ static int mdt_reint_internal(struct mdt_thread_info *info,
        if (rc < 0) {
                GOTO(out_ucred, rc);
        } else if (rc == 1) {
-               DEBUG_REQ(D_INODE, mdt_info_req(info), "resent opt.");
+               DEBUG_REQ(D_INODE, mdt_info_req(info), "resent opt");
                rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
                GOTO(out_ucred, rc);
        }
@@ -2334,7 +2574,7 @@ int mdt_device_sync(const struct lu_env *env, struct mdt_device *mdt)
 static int mdt_object_sync(const struct lu_env *env, struct obd_export *exp,
                           struct mdt_object *mo)
 {
-       int rc;
+       int rc = 0;
 
        ENTRY;
 
@@ -2345,7 +2585,16 @@ static int mdt_object_sync(const struct lu_env *env, struct obd_export *exp,
                RETURN(-ESTALE);
        }
 
-       rc = mo_object_sync(env, mdt_object_child(mo));
+       if (S_ISREG(lu_object_attr(&mo->mot_obj))) {
+               struct lu_target *tgt = tgt_ses_info(env)->tsi_tgt;
+               dt_obj_version_t version;
+
+               version = dt_version_get(env, mdt_obj2dt(mo));
+               if (version > tgt->lut_obd->obd_last_committed)
+                       rc = mo_object_sync(env, mdt_object_child(mo));
+       } else {
+               rc = mo_object_sync(env, mdt_object_child(mo));
+       }
 
        RETURN(rc);
 }
@@ -2367,6 +2616,9 @@ static int mdt_sync(struct tgt_session_info *tsi)
        } else {
                struct mdt_thread_info *info = tsi2mdt_info(tsi);
 
+               if (unlikely(info->mti_object == NULL))
+                       RETURN(-EPROTO);
+
                /* sync an object */
                rc = mdt_object_sync(tsi->tsi_env, tsi->tsi_exp,
                                     info->mti_object);
@@ -2475,12 +2727,14 @@ static int mdt_quotactl(struct tgt_session_info *tsi)
        case LUSTRE_Q_SETDEFAULT:
                if (!nodemap_can_setquota(nodemap))
                        GOTO(out_nodemap, rc = -EPERM);
+               /* fallthrough */
        case Q_GETINFO:
        case Q_GETQUOTA:
        case LUSTRE_Q_GETDEFAULT:
                if (qmt == NULL)
                        GOTO(out_nodemap, rc = -EOPNOTSUPP);
                /* slave quotactl */
+               /* fallthrough */
        case Q_GETOINFO:
        case Q_GETOQUOTA:
                break;
@@ -3124,8 +3378,9 @@ mdt_object_lock_internal(struct mdt_thread_info *info, struct mdt_object *o,
                 * object anyway XXX*/
                if (lh->mlh_type == MDT_PDO_LOCK &&
                    lh->mlh_pdo_hash != 0) {
-                       CDEBUG(D_INFO, "%s: "DFID" convert PDO lock to"
-                              "EX lock.\n", mdt_obd_name(info->mti_mdt),
+                       CDEBUG(D_INFO,
+                              "%s: "DFID" convert PDO lock to EX lock.\n",
+                              mdt_obd_name(info->mti_mdt),
                               PFID(mdt_object_fid(o)));
                        lh->mlh_pdo_hash = 0;
                        lh->mlh_rreg_mode = LCK_EX;
@@ -3542,7 +3797,7 @@ static int mdt_tgt_connect(struct tgt_session_info *tsi)
            cfs_fail_val ==
            tsi2mdt_info(tsi)->mti_mdt->mdt_seq_site.ss_node_id) {
                set_current_state(TASK_UNINTERRUPTIBLE);
-               schedule_timeout(msecs_to_jiffies(3 * MSEC_PER_SEC));
+               schedule_timeout(cfs_time_seconds(3));
        }
 
        return tgt_connect(tsi);
@@ -3688,7 +3943,7 @@ void mdt_intent_fixup_resent(struct mdt_thread_info *info,
         * If the xid matches, then we know this is a resent request, and allow
         * it. (It's probably an OPEN, for which we don't send a lock.
         */
-       if (req_can_reconstruct(req, NULL))
+       if (req_can_reconstruct(req, NULL) == 1)
                return;
 
         /*
@@ -3830,13 +4085,16 @@ static int mdt_intent_layout(enum ldlm_intent_flags it_opc,
                             struct ldlm_lock **lockp,
                             __u64 flags)
 {
-       struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_LAYOUT];
+       struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
        struct md_layout_change layout = { .mlc_opc = MD_LAYOUT_NOP };
        struct layout_intent *intent;
+       struct ldlm_reply *ldlm_rep;
        struct lu_fid *fid = &info->mti_tmp_fid2;
        struct mdt_object *obj = NULL;
        int layout_size = 0;
+       struct lu_buf *buf = &layout.mlc_buf;
        int rc = 0;
+
        ENTRY;
 
        fid_extract_from_res_name(fid, &(*lockp)->l_resource->lr_name);
@@ -3864,24 +4122,16 @@ static int mdt_intent_layout(enum ldlm_intent_flags it_opc,
        case LAYOUT_INTENT_RESTORE:
                CERROR("%s: Unsupported layout intent opc %d\n",
                       mdt_obd_name(info->mti_mdt), intent->li_opc);
-               rc = -ENOTSUPP;
-               break;
+               RETURN(-ENOTSUPP);
        default:
                CERROR("%s: Unknown layout intent opc %d\n",
                       mdt_obd_name(info->mti_mdt), intent->li_opc);
-               rc = -EINVAL;
-               break;
+               RETURN(-EINVAL);
        }
-       if (rc < 0)
-               RETURN(rc);
-
-       /* Get lock from request for possible resent case. */
-       mdt_intent_fixup_resent(info, *lockp, lhc, flags);
 
        obj = mdt_object_find(info->mti_env, info->mti_mdt, fid);
        if (IS_ERR(obj))
-               GOTO(out, rc = PTR_ERR(obj));
-
+               RETURN(PTR_ERR(obj));
 
        if (mdt_object_exists(obj) && !mdt_object_remote(obj)) {
                /* if layout is going to be changed don't use the current EA
@@ -3893,7 +4143,7 @@ static int mdt_intent_layout(enum ldlm_intent_flags it_opc,
                } else {
                        layout_size = mdt_attr_get_eabuf_size(info, obj);
                        if (layout_size < 0)
-                               GOTO(out_obj, rc = layout_size);
+                               GOTO(out, rc = layout_size);
 
                        if (layout_size > info->mti_mdt->mdt_max_mdsize)
                                info->mti_mdt->mdt_max_mdsize = layout_size;
@@ -3906,72 +4156,68 @@ static int mdt_intent_layout(enum ldlm_intent_flags it_opc,
         * set reply buffer size, so that ldlm_handle_enqueue0()->
         * ldlm_lvbo_fill() will fill the reply buffer with lovea.
         */
-       (*lockp)->l_lvb_type = LVB_T_LAYOUT;
        req_capsule_set_size(info->mti_pill, &RMF_DLM_LVB, RCL_SERVER,
                             layout_size);
        rc = req_capsule_server_pack(info->mti_pill);
        if (rc)
-               GOTO(out_obj, rc);
+               GOTO(out, rc);
 
+       ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
+       if (!ldlm_rep)
+               GOTO(out, rc = -EPROTO);
 
-       if (layout.mlc_opc != MD_LAYOUT_NOP) {
-               struct lu_buf *buf = &layout.mlc_buf;
+       mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
 
-               /**
-                * mdt_layout_change is a reint operation, when the request
-                * is resent, layout write shouldn't reprocess it again.
-                */
-               rc = mdt_check_resent(info, mdt_reconstruct_generic, lhc);
-               if (rc)
-                       GOTO(out_obj, rc = rc < 0 ? rc : 0);
+       /* take lock in ldlm_lock_enqueue() for LAYOUT_INTENT_ACCESS */
+       if (layout.mlc_opc == MD_LAYOUT_NOP)
+               GOTO(out, rc = 0);
 
-               /**
-                * There is another resent case: the client's job has been
-                * done by another client, referring lod_declare_layout_change
-                * -EALREADY case, and it became a operation w/o transaction,
-                * so we should not do the layout change, otherwise
-                * mdt_layout_change() will try to cancel the granted server
-                * CR lock whose remote counterpart is still in hold on the
-                * client, and a deadlock ensues.
-                */
-               rc = mdt_check_resent_lock(info, obj, lhc);
-               if (rc <= 0)
-                       GOTO(out_obj, rc);
-
-               buf->lb_buf = NULL;
-               buf->lb_len = 0;
-               if (unlikely(req_is_replay(mdt_info_req(info)))) {
-                       buf->lb_buf = req_capsule_client_get(info->mti_pill,
-                                       &RMF_EADATA);
-                       buf->lb_len = req_capsule_get_size(info->mti_pill,
-                                       &RMF_EADATA, RCL_CLIENT);
-                       /*
-                        * If it's a replay of layout write intent RPC, the
-                        * client has saved the extended lovea when
-                        * it get reply then.
-                        */
-                       if (buf->lb_len > 0)
-                               mdt_fix_lov_magic(info, buf->lb_buf);
-               }
+       rc = mdt_check_resent(info, mdt_reconstruct_generic, lhc);
+       if (rc < 0)
+               GOTO(out, rc);
+       if (rc == 1) {
+               DEBUG_REQ(D_INODE, mdt_info_req(info), "resent opt.");
+               rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
+               GOTO(out, rc);
+       }
+
+       buf->lb_buf = NULL;
+       buf->lb_len = 0;
+       if (unlikely(req_is_replay(mdt_info_req(info)))) {
+               buf->lb_buf = req_capsule_client_get(info->mti_pill,
+                                                    &RMF_EADATA);
+               buf->lb_len = req_capsule_get_size(info->mti_pill,
+                                                    &RMF_EADATA, RCL_CLIENT);
                /*
-                * Instantiate some layout components, if @buf contains
-                * lovea, then it's a replay of the layout intent write
-                * RPC.
+                * If it's a replay of layout write intent RPC, the client has
+                * saved the extended lovea when it get reply then.
                 */
-               rc = mdt_layout_change(info, obj, &layout);
-               if (rc)
-                       GOTO(out_obj, rc);
+               if (buf->lb_len > 0)
+                       mdt_fix_lov_magic(info, buf->lb_buf);
        }
-out_obj:
-       mdt_object_put(info->mti_env, obj);
 
-       if (rc == 0 && lustre_handle_is_used(&lhc->mlh_reg_lh))
+       /* Get lock from request for possible resent case. */
+       mdt_intent_fixup_resent(info, *lockp, lhc, flags);
+       (*lockp)->l_lvb_type = LVB_T_LAYOUT;
+
+       /*
+        * Instantiate some layout components, if @buf contains lovea, then it's
+        * a replay of the layout intent write RPC.
+        */
+       rc = mdt_layout_change(info, obj, lhc, &layout);
+       ldlm_rep->lock_policy_res2 = clear_serious(rc);
+
+       if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
                rc = mdt_intent_lock_replace(info, lockp, lhc, flags, rc);
+               if (rc == ELDLM_LOCK_REPLACED &&
+                   (*lockp)->l_granted_mode == LCK_EX)
+                       ldlm_lock_mode_downgrade(*lockp, LCK_CR);
+       }
 
+       EXIT;
 out:
-       lhc->mlh_reg_lh.cookie = 0;
-
-       RETURN(rc);
+       mdt_object_put(info->mti_env, obj);
+       return rc;
 }
 
 static int mdt_intent_open(enum ldlm_intent_flags it_opc,
@@ -4062,6 +4308,7 @@ static int mdt_intent_opc(enum ldlm_intent_flags it_opc,
                          u64);
        enum tgt_handler_flags it_handler_flags = 0;
        struct ldlm_reply *rep;
+       bool check_mdt_object = false;
        int rc;
        ENTRY;
 
@@ -4078,12 +4325,15 @@ static int mdt_intent_opc(enum ldlm_intent_flags it_opc,
                it_handler = &mdt_intent_open;
                break;
        case IT_GETATTR:
+               check_mdt_object = true;
+               /* fallthrough */
        case IT_LOOKUP:
                it_format = &RQF_LDLM_INTENT_GETATTR;
                it_handler = &mdt_intent_getattr;
                it_handler_flags = HAS_REPLY;
                break;
        case IT_GETXATTR:
+               check_mdt_object = true;
                it_format = &RQF_LDLM_INTENT_GETXATTR;
                it_handler = &mdt_intent_getxattr;
                it_handler_flags = HAS_BODY;
@@ -4129,6 +4379,9 @@ static int mdt_intent_opc(enum ldlm_intent_flags it_opc,
        if (rc < 0)
                RETURN(rc);
 
+       if (unlikely(info->mti_object == NULL && check_mdt_object))
+               RETURN(-EPROTO);
+
        if (it_handler_flags & IS_MUTABLE && mdt_rdonly(req->rq_export))
                RETURN(-EROFS);
 
@@ -4892,6 +5145,9 @@ static int mdt_tgt_getxattr(struct tgt_session_info *tsi)
        struct mdt_thread_info  *info = tsi2mdt_info(tsi);
        int                      rc;
 
+       if (unlikely(info->mti_object == NULL))
+               return -EPROTO;
+
        rc = mdt_getxattr(info);
 
        mdt_thread_info_fini(info);
@@ -4941,6 +5197,7 @@ TGT_MDT_HDL(HAS_BODY | HAS_REPLY, MDS_HSM_REQUEST,
 TGT_MDT_HDL(HAS_KEY | HAS_BODY | HAS_REPLY | IS_MUTABLE,
            MDS_SWAP_LAYOUTS,
            mdt_swap_layouts),
+TGT_MDT_HDL(IS_MUTABLE,                MDS_RMFID,      mdt_rmfid),
 };
 
 static struct tgt_handler mdt_io_ops[] = {
@@ -5041,8 +5298,8 @@ static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
        ping_evictor_stop();
 
        /* Remove the HSM /proc entry so the coordinator cannot be
-        * restarted by a user while it's shutting down. */
-       hsm_cdt_procfs_fini(m);
+        * restarted by a user while it's shutting down.
+        */
        mdt_hsm_cdt_stop(m);
 
        mdt_llog_ctxt_unclone(env, m, LLOG_AGENT_ORIG_CTXT);
@@ -5062,7 +5319,7 @@ static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
        /* Calling the cleanup functions in the same order as in the mdt_init0
         * error path
         */
-       mdt_procfs_fini(m);
+       mdt_tunables_fini(m);
 
        target_recovery_fini(obd);
        upcall_cache_cleanup(m->mdt_identity_cache);
@@ -5180,6 +5437,7 @@ static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
        m->mdt_enable_striped_dir = 1;
        m->mdt_enable_dir_migration = 1;
        m->mdt_enable_remote_dir_gid = 0;
+       m->mdt_enable_chprojid_gid = 0;
        m->mdt_enable_remote_rename = 1;
 
        atomic_set(&m->mdt_mds_mds_conns, 0);
@@ -5312,7 +5570,7 @@ static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
                GOTO(err_free_hsm, rc);
        }
 
-       rc = mdt_procfs_init(m, dev);
+       rc = mdt_tunables_init(m, dev);
        if (rc) {
                CERROR("Can't init MDT lprocfs, rc %d\n", rc);
                GOTO(err_recovery, rc);
@@ -5340,7 +5598,7 @@ static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
 
        RETURN(0);
 err_procfs:
-       mdt_procfs_fini(m);
+       mdt_tunables_fini(m);
 err_recovery:
        upcall_cache_cleanup(m->mdt_identity_cache);
        m->mdt_identity_cache = NULL;
@@ -5398,12 +5656,12 @@ static int mdt_process_config(const struct lu_env *env,
 
        switch (cfg->lcfg_command) {
        case LCFG_PARAM: {
-               struct obd_device          *obd = d->ld_obd;
-
+               struct obd_device *obd = d->ld_obd;
                /* For interoperability */
-               struct cfg_interop_param   *ptr = NULL;
-               struct lustre_cfg          *old_cfg = NULL;
-               char                       *param = NULL;
+               struct cfg_interop_param *ptr = NULL;
+               struct lustre_cfg *old_cfg = NULL;
+               char *param = NULL;
+               ssize_t count;
 
                param = lustre_cfg_string(cfg, 1);
                if (param == NULL) {
@@ -5432,17 +5690,22 @@ static int mdt_process_config(const struct lu_env *env,
                        }
                }
 
-               rc = class_process_proc_param(PARAM_MDT, obd->obd_vars,
-                                             cfg, obd);
-               if (rc > 0 || rc == -ENOSYS) {
+               count = class_modify_config(cfg, PARAM_MDT,
+                                           &obd->obd_kset.kobj);
+               if (count < 0) {
+                       struct coordinator *cdt = &m->mdt_coordinator;
+
                        /* is it an HSM var ? */
-                       rc = class_process_proc_param(PARAM_HSM,
-                                                     hsm_cdt_get_proc_vars(),
-                                                     cfg, obd);
-                       if (rc > 0 || rc == -ENOSYS)
+                       count = class_modify_config(cfg, PARAM_HSM,
+                                                   &cdt->cdt_hsm_kobj);
+                       if (count < 0)
                                /* we don't understand; pass it on */
                                rc = next->ld_ops->ldo_process_config(env, next,
                                                                      cfg);
+                       else
+                               rc = count > 0 ? 0 : count;
+               } else {
+                       rc = count > 0 ? 0 : count;
                }
 
                if (old_cfg)
@@ -5814,7 +6077,7 @@ static int mdt_ctxt_add_dirty_flag(struct lu_env *env,
 
 static int mdt_export_cleanup(struct obd_export *exp)
 {
-       struct list_head         closing_list;
+       LIST_HEAD(closing_list);
        struct mdt_export_data  *med = &exp->exp_mdt_data;
        struct obd_device       *obd = exp->exp_obd;
        struct mdt_device       *mdt;
@@ -5824,7 +6087,6 @@ static int mdt_export_cleanup(struct obd_export *exp)
        int rc = 0;
        ENTRY;
 
-       INIT_LIST_HEAD(&closing_list);
        spin_lock(&med->med_open_lock);
        while (!list_empty(&med->med_open_head)) {
                struct list_head *tmp = med->med_open_head.next;
@@ -5881,13 +6143,14 @@ static int mdt_export_cleanup(struct obd_export *exp)
                                ma->ma_valid = MA_FLAGS;
                                ma->ma_attr_flags |= MDS_KEEP_ORPHAN;
                        }
-                        mdt_mfd_close(info, mfd);
-                }
-        }
-        info->mti_mdt = NULL;
-        /* cleanup client slot early */
-        /* Do not erase record for recoverable client. */
-        if (!(exp->exp_flags & OBD_OPT_FAILOVER) || exp->exp_failed)
+                       ma->ma_valid |= MA_FORCE_LOG;
+                       mdt_mfd_close(info, mfd);
+               }
+       }
+       info->mti_mdt = NULL;
+       /* cleanup client slot early */
+       /* Do not erase record for recoverable client. */
+       if (!(exp->exp_flags & OBD_OPT_FAILOVER) || exp->exp_failed)
                tgt_client_del(&env, exp);
         lu_env_fini(&env);
 
@@ -5896,14 +6159,14 @@ static int mdt_export_cleanup(struct obd_export *exp)
 
 static inline void mdt_enable_slc(struct mdt_device *mdt)
 {
-       if (mdt->mdt_lut.lut_sync_lock_cancel == NEVER_SYNC_ON_CANCEL)
-               mdt->mdt_lut.lut_sync_lock_cancel = BLOCKING_SYNC_ON_CANCEL;
+       if (mdt->mdt_lut.lut_sync_lock_cancel == SYNC_LOCK_CANCEL_NEVER)
+               mdt->mdt_lut.lut_sync_lock_cancel = SYNC_LOCK_CANCEL_BLOCKING;
 }
 
 static inline void mdt_disable_slc(struct mdt_device *mdt)
 {
-       if (mdt->mdt_lut.lut_sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL)
-               mdt->mdt_lut.lut_sync_lock_cancel = NEVER_SYNC_ON_CANCEL;
+       if (mdt->mdt_lut.lut_sync_lock_cancel == SYNC_LOCK_CANCEL_BLOCKING)
+               mdt->mdt_lut.lut_sync_lock_cancel = SYNC_LOCK_CANCEL_NEVER;
 }
 
 static int mdt_obd_disconnect(struct obd_export *exp)
@@ -6062,6 +6325,11 @@ static int mdt_init_export(struct obd_export *exp)
        exp->exp_connecting = 1;
        spin_unlock(&exp->exp_lock);
 
+       OBD_ALLOC(exp->exp_used_slots,
+                 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
+       if (exp->exp_used_slots == NULL)
+               RETURN(-ENOMEM);
+
         /* self-export doesn't need client data and ldlm initialization */
         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
                                      &exp->exp_client_uuid)))
@@ -6080,6 +6348,10 @@ static int mdt_init_export(struct obd_export *exp)
 err_free:
        tgt_client_free(exp);
 err:
+       OBD_FREE(exp->exp_used_slots,
+                BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
+       exp->exp_used_slots = NULL;
+
        CERROR("%s: Failed to initialize export: rc = %d\n",
               exp->exp_obd->obd_name, rc);
        return rc;
@@ -6090,6 +6362,10 @@ static int mdt_destroy_export(struct obd_export *exp)
         ENTRY;
 
         target_destroy_export(exp);
+       if (exp->exp_used_slots)
+               OBD_FREE(exp->exp_used_slots,
+                        BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
+
         /* destroy can be called from failed obd_setup, so
          * checking uuid is safer than obd_self_export */
         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
@@ -6668,7 +6944,7 @@ static int mdt_obd_postrecov(struct obd_device *obd)
         return rc;
 }
 
-static struct obd_ops mdt_obd_device_ops = {
+static const struct obd_ops mdt_obd_device_ops = {
         .o_owner          = THIS_MODULE,
         .o_set_info_async = mdt_obd_set_info_async,
         .o_connect        = mdt_obd_connect,
@@ -6817,10 +7093,10 @@ static int __init mdt_init(void)
 {
        int rc;
 
-       CLASSERT(sizeof("0x0123456789ABCDEF:0x01234567:0x01234567") ==
-                FID_NOBRACE_LEN + 1);
-       CLASSERT(sizeof("[0x0123456789ABCDEF:0x01234567:0x01234567]") ==
-                FID_LEN + 1);
+       BUILD_BUG_ON(sizeof("0x0123456789ABCDEF:0x01234567:0x01234567") !=
+                    FID_NOBRACE_LEN + 1);
+       BUILD_BUG_ON(sizeof("[0x0123456789ABCDEF:0x01234567:0x01234567]") !=
+                    FID_LEN + 1);
        rc = lu_kmem_init(mdt_caches);
        if (rc)
                return rc;